Firearm lower receiver



FIG. 1 is a rear left isometric view of the firearm lower receiver;

FIG. 2 is a rear right isometric view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a cross sectional view taken along line 9-9 of FIG. 3.

The portions of the firearm lower receiver depicted in broken dash lines represent the bounds of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a firearm lower receiver, as shown and described. 